Browse Forums General Discussion 1 Feb 07, 2019 5:46 am Hi All, Just wanted to get some advice. Went to the block tonight and they have trenched for the slab. It doesn’t seem like the footings are very “clean cut” not sure what the bags are, maybe sand, as some areas look to be crumbling away. Any thoughts? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Trenching for slab - concerns of trench work need help 2Feb 07, 2019 6:55 am Hi Trent Smith That's one of the reasons I prefer to put down an engineered sand pad It's much easier to dig services, stronger, and more cost effective than polystyrene Void Fillers Always weigh up material costs and engineering Properties, Sand $30m3, Polystyrene $50m3, Concrete $200m3 Unfortunately you are up for more costs ie. concrete, hard digging,etc Thanks for the photos as it helps others Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Trenching for slab - concerns of trench work need help 3Feb 07, 2019 7:45 pm StructuralBIMGuy Hi Trent Smith That's one of the reasons I prefer to put down an engineered sand pad It's much easier to dig services, stronger, and more cost effective than polystyrene Void Fillers Always weigh up material costs and engineering Properties, Sand $30m3, Polystyrene $50m3, Concrete $200m3 Unfortunately you are up for more costs ie. concrete, hard digging,etc Thanks for the photos as it helps other Thank you for your post. Does this look acceptable? Not really too sure what it should be like. Re: Trenching for slab - concerns of trench work need help 5Feb 07, 2019 9:14 pm alexp79 I don't see much of poly voids, frankly speaking. What is inside the bags? Sand is inside the bag Re: Trenching for slab - concerns of trench work need help 7Feb 08, 2019 6:49 am Trent Smith StructuralBIMGuy Hi Trent Smith That's one of the reasons I prefer to put down an engineered sand pad It's much easier to dig services, stronger, and more cost effective than polystyrene Void Fillers Always weigh up material costs and engineering Properties, Sand $30m3, Polystyrene $50m3, Concrete $200m3 Unfortunately you are up for more costs ie. concrete, hard digging,etc Thanks for the photos as it helps other Thank you for your post. Does this look acceptable? Not really too sure what it should be like. No, it doesn't look acceptable, they are going to waste a lot of concrete and @ $200/m3, you will be paying extra , unfortunately dry clay is also difficult to dig, hence my choice for sand pad @$30/m3 You will need to discuss the extra concrete cost/charge with your builder? OT Things to watch out for during your build 1. Unnecessary High Costs 2. Waste 3. Poor workmanship/Skills 4. Builders Post Contract margins & Variations 5.Theft of Building material 6. Hidden commissions 7. Deliberate time delays 8. Non Compliance 9. Material and detail substitution 10,11... etc Forewarned is Forearmed hth Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Trenching for slab - concerns of trench work need help 8Feb 08, 2019 10:34 am They have not yet finished the pads with packing sand This is what it should look like Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Trenching for slab - concerns of trench work need help 9Feb 08, 2019 3:42 pm Trent Smith Hi All, Just wanted to get some advice. Went to the block tonight and they have trenched for the slab. It doesn’t seem like the footings are very “clean cut” not sure what the bags are, maybe sand, as some areas look to be crumbling away. Any thoughts? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Have you paid a fixed price for the slab? Keep an eye on the reinforcing, make sure it is per the drawings and has cover from the sides and bottom of the trenches. Mark Armstrong BSc (Eng) MIEAust CPEng Development Manager http://www.katanafoundations.com.au http://www.polyvoid.com.au http://www.biax.com.au 2 4489 Hi, I'm in the process of making a footing with two pieces of trench mesh (4L12TM ) at the top and bottom. I'm wondering if anyone knows how far beneath the top of the… 0 3153 Thanks for all replies. I just noticed now the pictures I added to post right on top of page were wrong. I attached pictures showing "current" and my "suggested" floor… 9 14901 |